Quote:
Originally Posted by boroda1
OK, there is one thing, I want to wa rn you about this Johnson's angle meter:
I t MAY BE OFF.
Probably, it's odd, but mine was. I did installation in April, when my black shingle roof was hot...
I could not get my mast plumb from all the sides.
And, as for newbie, it took me an hour to figure out(and to scorch), the angle metter is off by 2 degrees: so when it's perfect vertically aligned , it shows 2º.
Maybe I will post a picture later, but still, before using, test it with a regular bubble level. If you know the error is 2º, you still can use this tool successfully
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Yeah, with any angle meter or level, it's a good idea to check it in two directions. Like put it on a flat surface, and see what it reads, then turn it 180, and see what it reads. Should be the same, reading in the other direction. Like if it says 5 degrees the first time, it should be 5 deg in the other direction when you reverse it. If the meter is off they won't be the same. Same for a regular bubble level. I have a level with an adjustable bubble, and you can use this technique to calibrate it.